List<VUsresrptitemcount> vusresrptitemcountList = map.get(tstudyroom.getName());
List<VUsresrptitemcount> vusresrptitemcountList1= vusresrptitemcountList.stream().collect(
collectingAndThen(
toCollection(() ->new TreeSet<>(Comparator.comparing(o-> o.getrNumber()))), ArrayList::new));
rNumberと同じデータが重複排除されます